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Hamilton Insurance Group, Ltd.

For the period ended Sep 30, 2025. Filed Nov 5, 2025.

View on SEC.gov

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2025 · Filed Nov 5, 2025

HG$36.94-0.1%Stored close · as of Nov 6, 2026

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Summary Results of Operations

Consolidated Results of Operations

The following is a comparison of selected data for our consolidated results of operations:

For the Three Months Ended
September 30,
($ in thousands, except per share amounts)20252024
Gross premiums written$698,845$553,401
Net premiums written$578,981$477,896
Net premiums earned$522,999$448,795
Third party fee income(1)4,1694,464
Claims and Expenses
Losses and loss adjustment expenses278,712273,632
Acquisition costs125,412102,201
Other underwriting expenses(2)58,95548,332
Underwriting income (loss)(3)64,08929,094
Net realized and unrealized gains (losses) on investments115,13648,228
Net investment income (loss)(4)22,72717,330
Total net realized and unrealized gains (losses) on investments and net investment income (loss)137,86365,558
Net foreign exchange gains (losses)2,619(5,973)
Corporate expenses(2)15,34714,060
Amortization of intangible assets4,0005,204
Interest expense4,9335,351
Income tax expense (benefit)3,8663,029
Net income (loss)176,42561,035
Net income (loss) attributable to non-controlling interest(5)40,225(17,215)
Net income (loss) attributable to common shareholders$136,200$78,250
Diluted income (loss) per share attributable to common shareholders$1.32$0.74
Key Ratios
Attritional loss ratio - current year55.4%53.2%
Attritional loss ratio - prior year development(2.1)%(0.7)%
Catastrophe loss ratio - current year0.0%11.5%
Catastrophe loss ratio - prior year development0.0%(3.0)%
Loss and loss adjustment expense ratio53.3%61.0%
Acquisition cost ratio24.0%22.8%
Other underwriting expense ratio10.5%9.8%
Combined ratio87.8%93.6%
Return on average common shareholders' equity5.2%3.4%

The following table summarizes book value per share and balance sheet data:

($ in thousands, except per share amounts)As at
Book ValueSeptember 30,2025June 30,2025
Tangible book value per common share$26.16$24.65
Change in tangible book value per common share6.1%
Book value per common share$27.06$25.55
Change in book value per common share5.9%
Balance Sheet Data
Total assets$9,213,370$8,913,050
Total shareholders' equity$2,661,993$2,558,591

(1) Third party fee income is a non-GAAP financial measure as defined in Item 10(e) of SEC Regulation S-K. Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non-GAAP Measures' for further details.

(2) Other underwriting expenses is a non-GAAP financial measure as defined in Item 10(e) of SEC Regulation S-K. The reconciliation to general and administrative expenses, the most directly comparable GAAP financial measure, also included corporate expenses of $15.3 million, and $14.1 million for the three months ended September 30, 2025 and 2024, respectively. Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non-GAAP Measures' for further details.

(3) Underwriting income (loss) is a non-GAAP financial measure as defined in Item 10(e) of SEC Regulation S-K. Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non-GAAP Measures' for further details.

(4) Net investment income (loss) is presented net of investment management fees.

(5) Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations—Consolidated Results of Operations—Corporate and Other' for further details.

Operating Highlights

The following significant items impacted the consolidated results of operations for the three months ended September 30, 2025 and 2024:

Gross premiums written Gross premiums written were $698.8 million and $553.4 million for the three months ended September 30, 2025 and 2024, respectively. The increase in gross premiums written was primarily driven by our casualty reinsurance classes and casualty, specialty and property insurance classes. The increase was as a result of growth in both new and existing business for the three months ended September 30, 2025.

Underwriting results The combined ratio was 87.8% and 93.6% for the three months ended September 30, 2025 and 2024, respectively. The decrease was primarily driven by a decrease in the catastrophe loss ratio, partially offset by an increase in the acquisition cost ratio and other underwriting expense ratio.

For the Three Months Ended
($ in thousands)Current year% of net premiums earnedPrior year development% of net premiums earnedLosses and loss adjustment expenses% of net premiums earned
Attritional losses$289,87455.4%$(11,162)(2.1)%$278,71253.3%
Catastrophe losses—0.0%—0.0%—0.0%
Total$289,87455.4%$(11,162)(2.1)%$278,71253.3%
Attritional losses$238,55453.2%$(3,209)(0.7)%$235,34552.5%
Catastrophe losses51,69911.5%(13,412)(3.0)%38,2878.5%
Total$290,25364.7%$(16,621)(3.7)%$273,63261.0%

Attritional loss ratio - current year for the three months ended September 30, 2025 was 55.4% compared to 53.2% for the three months ended September 30, 2024, an increase of 2.2 percentage points. The increase was primarily driven by a specific large loss in our Bermuda specialty and property reinsurance classes and a change in business mix, including more casualty reinsurance business.

Attritional loss ratio - prior year for the three months ended September 30, 2025 was a favorable 2.1% compared to a favorable 0.7% for the three months ended September 30, 2024, a decrease of 1.4 percentage points. The attritional loss ratio - prior year for the three months ended September 30, 2025 was primarily driven by favorable development in both our Bermuda and International property classes and our Bermuda specialty classes. In addition, casualty business protected by the loss portfolio transfer ("LPT") discussed in Note 6, Reinsurance, benefited from favorable development in the underlying reserves of $0.3 million and a change in the deferred gain of $0.1 million, for a total net positive earnings impact of $0.4 million. The attritional loss ratio - prior year for the three months ended September 30, 2024 was primarily driven by favorable development in property and specialty classes in both our International and Bermuda segments, partially offset by unfavorable development in casualty classes in both our International and Bermuda segments. In addition, casualty business protected by the LPT benefited from favorable development in the underlying reserves of $1.7 million, which was partially offset by a change in the deferred gain of $0.6 million, for a total net positive earnings impact of $1.1 million.

Catastrophe losses - current year and prior year development were $Nil for the three months ended September 30, 2025. Catastrophe losses - current year and prior year for the three months ended September 30, 2024 were driven by Hurricane Helene ($33.9 million), the Calgary hailstorms ($12.3 million), and Hurricane Debby ($5.5 million), partially offset by favorable prior year development of $13.4 million.

For the Three Months Ended
September 30,
($ in thousands)20252024
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - TSHF(1)$94,469$(28,291)
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other43,39493,849
$137,863$65,558
Net income (loss) attributable to non-controlling interest - TSHF$40,225$(17,215)

Total net realized and unrealized gains (losses) on investments and net investment income (loss) -TSHF, prior to non-controlling interest, returned income of $94.5 million and a loss of $28.3 million for the three months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees.

Net investment income, net of non-controlling interest - TSHF, returned income of $54.2 million and a loss of $11.1 million for the three months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees and performance incentive allocations. The aggregate incentive allocation to which the investment manager is entitled is included in "Net income (loss) attributable to non-controlling interest" in our GAAP financial statements.

TS Hamilton Fund produced returns, net of investment management fees and performance incentive allocations, of 2.6% and (0.6)% for the three months ended September 30, 2025 and 2024, respectively.

For the three months ended September 30, 2025, TS Hamilton Fund experienced gains from single name equities trading within the equity market neutral vehicles STV, ESTV, and ATV. Gains from single name equities trading were led by the U.S., followed by East Asia. TS Hamilton Fund also experienced gains from macro trading within the systematic macro vehicle, FTV, and the relative value macro vehicle, HTV. Gains in TS Hamilton Fund were partially offset by losses from macro trading within the scientific discretionary macro vehicle, NTV, and the relative value rates vehicle, KTV. Losses from such macro trading were led by fixed income in NTV, and derivatives relative value in KTV.

For the three months ended September 30, 2024, losses in TS Hamilton Fund were led by macroeconomic trading in FTV. Within FTV, losses were experienced in equities, currencies, and fixed income. In single name equities trading, TS Hamilton Fund saw positive contributions from non-U.S. equities within ESTV, which were partially offset by losses from U.S. equities within Two Sigma STV. Within ESTV, gains were led by Europe, East Asia, and Pan-America, in decreasing order.

Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other, returned income of $43.4 million and $93.8 million for the three months ended September 30, 2025 and 2024, respectively. Income for the three months ended September 30, 2025 was driven by both investment income and positive mark-to-market returns. Income for the three months ended September 30, 2024 was primarily driven by investment income on higher yielding assets and positive mark-to-market returns as a result of decreasing U.S. Treasury interest rates.

Segment Information

We have determined our reportable business segments based on the information used by management in assessing performance and allocating resources to underwriting operations. We have identified two reportable business segments - International and Bermuda. Each of our identified reportable segments has a Chief Executive Officer who is responsible for the overall profitability of their segment and who regularly reports and is directly accountable to the chief operating decision maker ("CODM"): the Chief Executive Officer of the consolidated group. The CODM's responsibilities include providing leadership to all levels of employees; developing culture, values, and ethos; setting the Company's strategy, vision and direction; and overall responsibility for the success and profitability of the Company, including evaluating segment performance.

The CODM evaluates reportable segment performance based on the segments' respective underwriting income or loss. Underwriting income or loss is calculated as net premiums earned less losses and loss adjustment expenses, acquisition costs, and other underwriting expenses, net of third party fee income. General and administrative expenses not incurred by the reportable segments are included in corporate and other expenses as part of the reconciliation of net underwriting income or loss to net income or loss attributable to common shareholders. As we do not manage our assets by reportable segment, investment income and assets are not allocated to reportable segments.

Our core business is underwriting and our underwriting results are reflected in our reportable segments: (1) International, which is comprised of property, casualty and specialty insurance and reinsurance classes of business originating from the Company’s London, Dublin, and Hamilton Select operations; and (2) Bermuda, which is comprised of property, casualty and specialty insurance and reinsurance classes of business originating from Hamilton Re, Bermuda and Hamilton Re US and subsidiaries. We consider many factors, including the nature of each segment’s products, client types, production sources, distribution methods and the regulatory environment, in determining the aggregated operating segments.

Corporate includes net realized and unrealized gains (losses) on investments, net investment income (loss), net foreign exchange gains (losses), general and administrative expenses not incurred by the reportable segments, amortization of intangible assets, interest expense, and income tax expense (benefit).

International Segment

For the Three Months Ended
September 30,
($ in thousands)20252024
Gross premiums written$379,957$325,525
Net premiums written$304,410$268,106
Net premiums earned$252,302$225,244
Third party fee income2,1374,170
Claims and Expenses
Losses and loss adjustment expenses133,895130,135
Acquisition costs67,00759,713
Other underwriting expenses41,70334,143
Underwriting income (loss)$11,834$5,423
Attritional losses - current year$139,390$124,519
Attritional losses - prior year development(5,495)(3,279)
Catastrophe losses - current year—14,384
Catastrophe losses - prior year development—(5,489)
Losses and loss adjustment expenses$133,895$130,135
Attritional loss ratio - current year55.3%55.3%
Attritional loss ratio - prior year development(2.2)%(1.5)%
Catastrophe loss ratio - current year0.0%6.4%
Catastrophe loss ratio - prior year development0.0%(2.4)%
Losses and loss adjustment expense ratio53.1%57.8%
Acquisition cost ratio26.6%26.5%
Other underwriting expense ratio15.7%13.3%
Combined ratio95.4%97.6%
For the Three Months Ended
September 30,
($ in thousands)20252024
Property$63,894$51,441
Casualty167,107144,107
Specialty148,956129,977
Total$379,957$325,525

Gross premiums written increased by $54.4 million, or 16.7%, from $325.5 million for the three months ended September 30, 2024 to $380.0 million for the three months ended September 30, 2025. The increase was primarily driven by growth in both new and existing business across casualty, specialty and property insurance classes.

For the Three Months Ended
September 30,
($ in thousands)20252024
Property$47,813$37,033
Casualty91,84186,062
Specialty112,648102,149
Total$252,302$225,244

Net premiums earned increased by $27.1 million, or 12.0%, from $225.2 million for the three months ended September 30, 2024 to $252.3 million for the three months ended September 30, 2025. The increase was primarily driven by growth in our specialty, property and casualty insurance classes. Specialty insurance growth was primarily driven by marine & energy, fine art & specie and accident & health; property insurance growth was primarily driven by property binder business; and casualty insurance growth was primarily driven by U.S. excess and surplus lines.

For the Three Months Ended
September 30,
($ in thousands)20252024
Third party fee income$2,137$4,170

Third party fee income decreased by $2.0 million, from $4.2 million for the three months ended September 30, 2024 to $2.1 million for the three months ended September 30, 2025. The decrease was primarily due to a decrease in syndicate management fees. Effective July 1, 2025, the management of the third party syndicate was novated from Hamilton Managing Agency to another Lloyd's managing agency. This ended the Company's management of third party syndicates.

For the Three Months Ended
($ in thousands)Current year% of net premiums earnedPrior year development% of net premiums earnedLosses and loss adjustment expenses% of net premiums earned
Attritional losses$139,39055.3%$(5,495)(2.2)%$133,89553.1%
Catastrophe losses—0.0%—0.0%—0.0%
Total$139,39055.3%$(5,495)(2.2)%$133,89553.1%
Attritional losses$124,51955.3%$(3,279)(1.5)%$121,24053.8%
Catastrophe losses14,3846.4%(5,489)(2.4)%8,8954.0%
Total$138,90361.7%$(8,768)(3.9)%$130,13557.8%

Attritional loss ratio - current year for the three months ended September 30, 2025 was flat at 55.3% compared to 55.3% for the three months ended September 30, 2024.

Attritional loss ratio - prior year for the three months ended September 30, 2025 was a favorable 2.2% compared to a favorable 1.5% for the three months ended September 30, 2024, a decrease of 0.7 percentage points. The favorable attritional loss ratio - prior year for the three months ended September 30, 2025 was primarily driven by favorable development in property insurance classes. In addition, casualty business protected by the LPT discussed in Note 6, Reinsurance, benefited from favorable development in the underlying reserves of $0.3 million and a change in the deferred gain of $0.1 million, for a total net positive earnings impact of $0.4 million.

Catastrophe losses - current year and prior year were $Nil for the three months ended September 30, 2025. Catastrophe losses - current year and prior year for the three months ended September 30, 2024 were driven by Hurricane Helene ($12.9 million) and Hurricane Debby ($1.5 million), partially offset by favorable prior year development of $5.5 million.

For the Three Months Ended
Acquisition Costs · % of Net Premiums Earned
($ in thousands)September 30,2025September 30,2024September 30,2025September 30,2024'25 vs '24point r
Property$15,459$13,26932.3%35.8%(3.5)
Casualty16,37215,40417.8%17.9%(0.1)
Specialty35,17631,04031.2%30.4%0.8
Total$67,007$59,71326.6%26.5%0.1

The acquisition cost ratio for the three months ended September 30, 2025 increased modestly to 26.6%, compared to 26.5% for the three months ended September 30, 2024.

For the Three Months Ended
September 30,
($ in thousands)20252024
Other underwriting expenses$41,703$34,143
Other underwriting expense ratio15.7%13.3%

Other underwriting expenses for the three months ended September 30, 2025 were $41.7 million, an increase of $7.6 million, or 22.1%, compared to $34.1 million for the three months ended September 30, 2024. The increase was primarily driven by an increased headcount, as we continued to build out underwriting teams supporting the corresponding increase in premium volume and an increase in certain variable performance based compensation costs.

The other underwriting expense ratios for the three months ended September 30, 2025 and 2024 increased from 13.3% to 15.7% driven by an increase in the underlying costs and a decrease in third party fee income, partially offset by growth in the premium base.

Bermuda Segment

For the Three Months Ended
September 30,
($ in thousands)20252024
Gross premiums written$318,888$227,876
Net premiums written$274,571$209,790
Net premiums earned$270,697$223,551
Third party fee income2,032294
Claims and Expenses
Losses and loss adjustment expenses144,817143,497
Acquisition costs58,40542,488
Other underwriting expenses17,25214,189
Underwriting income (loss)$52,255$23,671
Attritional losses - current year$150,484$114,035
Attritional losses - prior year development(5,667)70
Catastrophe losses - current year—37,315
Catastrophe losses - prior year development—(7,923)
Losses and loss adjustment expenses$144,817$143,497
Attritional loss ratio - current year55.6%51.0%
Attritional loss ratio - prior year development(2.1)%0.0%
Catastrophe loss ratio - current year0.0%16.7%
Catastrophe loss ratio - prior year development0.0%(3.5)%
Losses and loss adjustment expense ratio53.5%64.2%
Acquisition cost ratio21.6%19.0%
Other underwriting expense ratio5.6%6.2%
Combined ratio80.7%89.4%
For the Three Months Ended
September 30,
($ in thousands)20252024
Property$70,732$68,560
Casualty210,376128,891
Specialty37,78030,425
Total$318,888$227,876

Gross premiums written increased by $91.0 million, or 39.9%, from $227.9 million for the three months ended September 30, 2024 to $318.9 million for the three months ended September 30, 2025. The increase was primarily driven by growth in both new and existing business in casualty and specialty reinsurance classes.

For the Three Months Ended
September 30,
($ in thousands)20252024
Property$82,435$84,733
Casualty152,156107,886
Specialty36,10630,932
Total$270,697$223,551

Net premiums earned increased by $47.1 million, or 21.1%, from $223.6 million for the three months ended September 30, 2024 to $270.7 million for the three months ended September 30, 2025. The increase was primarily driven by new business and volume growth in our casualty reinsurance classes. The most significant drivers of this increase were general liability and professional liability.

For the Three Months Ended
September 30,
($ in thousands)20252024
Third party fee income$2,032$294

Third party fee income is generated by certain performance based management fees recognized by Ada Capital Management Limited for services provided to Ada Re, Ltd. and increased by $1.7 million, from $0.3 million for the three months ended September 30, 2024 to $2.0 million for the three months ended September 30, 2025.

For the Three Months Ended
($ in thousands)Current year% of net premiums earnedPrior year development% of net premiums earnedLosses and loss adjustment expenses% of net premiums earned
Attritional losses$150,48455.6%$(5,667)(2.1)%$144,81753.5%
Catastrophe losses—0.0%—0.0%—0.0%
Total$150,48455.6%$(5,667)(2.1)%$144,81753.5%
Attritional losses$114,03551.0%$700.0%$114,10551.0%
Catastrophe losses37,31516.7%(7,923)(3.5)%29,39213.2%
Total$151,35067.7%$(7,853)(3.5)%$143,49764.2%

Attritional loss ratio - current year for the three months ended September 30, 2025 was 55.6% compared to 51.0% for the three months ended September 30, 2024, an increase of 4.6 percentage points. The increase was primarily driven by a specific large loss in specialty and property reinsurance classes and a change in business mix, including more proportional casualty reinsurance business.

Attritional loss ratio - prior year for the three months ended September 30, 2025 was a favorable 2.1%, compared to Nil for the three months ended September 30, 2024, a decrease of 2.1 percentage points. The favorable attritional loss ratio - prior year for the three months ended September 30, 2025 was primarily driven by favorable development in specialty and property reinsurance classes.

Catastrophe losses - current year and prior year were $Nil for the three months ended September 30, 2025. Catastrophe losses - current year and prior year for the three months ended September 30, 2024 were driven by Hurricane Helene ($21.0 million), the Calgary hailstorms ($12.3 million), and Hurricane Debby ($4.0 million), partially offset by favorable prior year development of $7.9 million.

For the Three Months Ended
Acquisition Costs · % of Net Premiums Earned
($ in thousands)September 30,2025September 30,2024September 30,2025September 30,2024'25 vs '24point r
Property$11,777$9,25514.3%10.9%3.4
Casualty39,70826,19426.1%24.3%1.8
Specialty6,9207,03919.2%22.8%(3.6)
Total$58,405$42,48821.6%19.0%2.6

The acquisition cost ratio for the three months ended September 30, 2025 increased to 21.6%, compared to 19.0% for the three months ended September 30, 2024. The increase was primarily driven by a change in business mix, including more proportional business written in our casualty reinsurance classes.

For the Three Months Ended
September 30,
($ in thousands)20252024
Other underwriting expenses$17,252$14,189
Other underwriting expense ratio5.6%6.2%

Other underwriting expenses for the three months ended September 30, 2025 were $17.3 million, an increase of $3.1 million, or 21.6%, compared to $14.2 million for the three months ended September 30, 2024. The increase was primarily driven by an increased headcount as we continued to build out underwriting teams supporting the corresponding increase in premium volume and an increase in certain variable performance based compensation costs.

The other underwriting expense ratio for the three months ended September 30, 2025 and 2024 decreased from 6.2% to 5.6%, primarily as a result of growth in the premium base and certain performance based management fees recognized by Ada Capital Management Limited for services provided to Ada Re, Ltd.

Corporate and Other

For the Three Months Ended
September 30,
($ in thousands)20252024
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - TSHF(1)$94,469$(28,291)
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other43,39493,849
$137,863$65,558
Net income (loss) attributable to non-controlling interest - TSHF$40,225$(17,215)

Total net realized and unrealized gains (losses) on investments and net investment income (loss) -TSHF, prior to non-controlling interest, returned income of $94.5 million and a loss of $28.3 million for the three months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees.

Net investment income, net of non-controlling interest - TSHF, returned income of $54.2 million and a loss of $11.1 million for the three months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees and performance incentive allocations. The aggregate incentive allocation to which the investment manager is entitled is included in "Net income (loss) attributable to non-controlling interest" in our GAAP financial statements.

TS Hamilton Fund produced returns, net of investment management fees and performance incentive allocations, of 2.6% and (0.6)% for the three months ended September 30, 2025 and 2024, respectively.

For the three months ended September 30, 2025, TS Hamilton Fund experienced gains from single name equities trading within the equity market neutral vehicles STV, ESTV, and ATV. Gains from single name equities trading were led by the U.S., followed by East Asia. TS Hamilton Fund also experienced gains from macro trading within the systematic macro vehicle, FTV, and the relative value macro vehicle, HTV. Gains in TS Hamilton Fund were partially offset by losses from macro trading within the scientific discretionary macro vehicle, NTV, and the relative value rates vehicle, KTV. Losses from such macro trading were led by fixed income in NTV, and derivatives relative value in KTV.

For the three months ended September 30, 2024, losses in TS Hamilton Fund were led by macroeconomic trading in FTV. Within FTV, losses were experienced in equities, currencies, and fixed income. In single name equities trading, TS Hamilton Fund saw positive contributions from non-U.S. equities within ESTV, which were partially offset by losses from U.S. equities within Two Sigma STV. Within ESTV, gains were led by Europe, East Asia, and Pan-America, in decreasing order.

Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other, returned income of $43.4 million and $93.8 million for the three months ended September 30, 2025 and 2024, respectively. Income for the three months ended September 30, 2025 was driven by both investment income and positive mark-to-market returns. Income for the three months ended September 30, 2024 was primarily driven by investment income on higher yielding assets and positive mark-to-market returns as a result of decreasing U.S. Treasury interest rates.

Net Foreign Exchange Gains (Losses)

For the Three Months Ended
September 30,
($ in thousands)20252024
Net foreign exchange gains (losses)$2,619$(5,973)

Our functional currency is the U.S. Dollar. We may conduct routine underwriting operations or invest a portion of our cash and other investable assets in currencies other than U.S. Dollars. Consequently, we may incur foreign exchange gains and losses in our results of operations.

Foreign exchange gains of $2.6 million and losses of $6.0 million for the three months ended September 30, 2025 and 2024, respectively, were primarily driven by the remeasurement of insurance-related assets and liabilities denominated in British Pounds, Euro, Japanese Yen, and Australian and Canadian Dollars.

Corporate Expenses

For the Three Months Ended
September 30,
($ in thousands)20252024
Corporate expenses$15,347$14,060

Corporate expenses for the three months ended September 30, 2025 were $15.3 million, compared to $14.1 million for the three months ended September 30, 2024, an increase of $1.3 million. The increase was primarily driven by certain variable performance based compensation costs, partially offset by lower Value Appreciation Pool ("VAP") expenses.

Amortization of Intangible Assets

For the Three Months Ended
September 30,
($ in thousands)20252024
Amortization of intangible assets$4,000$5,204

Amortization of intangible assets of $4.0 million and $5.2 million for the three months ended September 30, 2025 and 2024, respectively, relates to internally developed software and intangible assets acquired in a business combination. The decrease in amortization expense is primarily driven by the timing of completion of certain projects.

Interest Expense

For the Three Months Ended
September 30,
($ in thousands)20252024
Interest expense$4,933$5,351

Interest expense of $4.9 million and $5.4 million for the three months ended September 30, 2025 and 2024, respectively, relates to interest payments and certain administrative fees associated with our term loan and letter of credit facilities. The decrease in interest expense is primarily driven by the decrease in the Secured Overnight Financing Rate ("SOFR") which underlies the floating rate associated with the term loan.

Income Tax Expense (Benefit)

For the Three Months Ended
September 30,
($ in thousands)20252024
Income tax expense (benefit)$3,866$3,029

Income tax expense (benefit) for the three months ended September 30, 2025 was $3.9 million, compared to $3.0 million for the three months ended September 30, 2024, an increase of $0.8 million. Tax expense is primarily driven by withholding taxes on investment income from TS Hamilton Fund and income tax expense on earnings from our U.S. and Dublin operations, partially offset by a decrease in valuation allowance.

Consolidated Results of Operations

The following is a comparison of selected data for our consolidated results of operations:

For the Nine Months Ended
September 30,
($ in thousands, except per share amounts)20252024
Gross premiums written$2,254,177$1,878,645
Net premiums written$1,739,169$1,467,843
Net premiums earned$1,533,090$1,252,862
Third party fee income(1)13,84517,934
Claims and Expenses
Losses and loss adjustment expenses943,875720,478
Acquisition costs365,108283,059
Other underwriting expenses(2)164,664140,339
Underwriting income (loss)(3)73,288126,920
Net realized and unrealized gains (losses) on investments571,964454,851
Net investment income (loss)(4)62,72143,667
Total net realized and unrealized gains (losses) on investments and net investment income (loss)634,685498,518
Net foreign exchange gains (losses)(4,422)(9,883)
Corporate expenses(2)41,16841,825
Amortization of intangible assets11,89511,773
Interest expense15,26417,090
Income tax expense (benefit)9,7486,118
Net income (loss)625,476538,749
Net income (loss) attributable to non-controlling interest(5)220,990172,240
Net income (loss) attributable to common shareholders$404,486$366,509
Diluted income (loss) per share attributable to common shareholders$3.88$3.33
Key Ratios
Attritional loss ratio - current year53.4%53.9%
Attritional loss ratio - prior year development(1.8)%0.6%
Catastrophe loss ratio - current year11.1%4.1%
Catastrophe loss ratio - prior year development(1.1)%(1.1)%
Loss and loss adjustment expense ratio61.6%57.5%
Acquisition cost ratio23.8%22.6%
Other underwriting expense ratio9.8%9.8%
Combined ratio95.2%89.9%
Return on average common shareholders' equity16.2%16.8%

The following table summarizes book value per share and balance sheet data:

($ in thousands, except per share amounts)As at
Book ValueSeptember 30,2025December 31,2024
Tangible book value per common share$26.16$22.03
Change in tangible book value per common share18.7%
Book value per common share$27.06$22.95
Change in book value per common share17.9%
Balance Sheet Data
Total assets$9,213,370$7,796,033
Total shareholders' equity$2,661,993$2,328,709

(1) Third party fee income is a non-GAAP financial measure as defined in Item 10(e) of SEC Regulation S-K. Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non-GAAP Measures' for further details.

(2) Other underwriting expenses is a non-GAAP financial measure as defined in Item 10(e) of SEC Regulation S-K. The reconciliation to general and administrative expenses, the most directly comparable GAAP financial measure, also included corporate expenses of $41.2 million and $41.8 million for the nine months ended September 30, 2025 and 2024, respectively. Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non-GAAP Measures' for further details.

(3) Underwriting income (loss) is a non-GAAP financial measure as defined in Item 10(e) of SEC Regulation S-K. Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non-GAAP Measures' for further details.

(4) Net investment income (loss) is presented net of investment management fees.

(5) Refer to 'Management’s Discussion and Analysis of Financial Condition and Results of Operations—Consolidated Results of Operations—Corporate and Other' for further details.

Operating Highlights

The following significant items impacted the consolidated results of operations for the nine months ended September 30, 2025 and 2024:

Gross premiums written Gross premiums written were $2.3 billion and $1.9 billion for the nine months ended September 30, 2025 and 2024, respectively. The increase in gross premiums written was primarily driven by our casualty and property reinsurance classes and casualty, specialty and property insurance classes. The increase was as a result of growth in both new and existing business for the nine months ended September 30, 2025.

Underwriting results The combined ratio was 95.2% and 89.9% for the nine months ended September 30, 2025 and 2024, respectively. The increase was primarily driven by an increase in the catastrophe loss ratio and the acquisition cost ratio, partially offset by a decrease in the attritional loss ratio.

For the Nine Months Ended
($ in thousands)Current year% of net premiums earnedPrior year development% of net premiums earnedLosses and loss adjustment expenses% of net premiums earned
Attritional losses$820,10953.4%$(28,270)(1.8)%$791,83951.6%
Catastrophe losses169,62011.1%(17,584)(1.1)%152,03610.0%
Total$989,72964.5%$(45,854)(2.9)%$943,87561.6%
Attritional losses$674,90353.9%$7,0910.6%$681,99454.5%
Catastrophe losses51,6994.1%(13,215)(1.1)%38,4843.0%
Total$726,60258.0%$(6,124)(0.5)%$720,47857.5%

Attritional loss ratio - current year for the nine months ended September 30, 2025 was 53.4% compared to 53.9% for the nine months ended September 30, 2024, a decrease of 0.5 percentage points. The attritional loss ratio - current year for the nine months ended September 30, 2025 was impacted by two large losses primarily in our Bermuda specialty and property reinsurance classes and a change in business mix, including more casualty reinsurance business. The attritional loss ratio - current year for the nine months ended September 30, 2024 included a specific large loss of $37.9 million arising from the Francis Scott Key Baltimore Bridge collapse.

Attritional loss ratio - prior year for the nine months ended September 30, 2025 was a favorable 1.8% compared to an unfavorable 0.6% for the nine months ended September 30, 2024, a decrease of 2.4 percentage points. The attritional loss ratio - prior year for the nine months ended September 30, 2025 was primarily driven by favorable development in both our Bermuda and International specialty and property classes, partially offset by unfavorable development in certain Bermuda casualty classes. In addition, casualty business protected by the LPT discussed in Note 6, Reinsurance, benefited from favorable development in the underlying reserves of $4.2 million, which was partially offset by a change in the deferred gain of $2.5 million, for a total net positive earnings impact of $1.7 million. The attritional loss ratio - prior year for the nine months ended September 30, 2024 was primarily driven by unfavorable development in casualty classes in both our International and Bermuda segments and specialty insurance classes in our International segment, partially offset by favorable development in our International and Bermuda property classes. In addition, casualty business protected by the LPT benefited from favorable development in the underlying reserves of $1.4 million and a $1.3 million change in the deferred gain, for a total net positive earnings impact of $2.7 million.

Catastrophe losses - current year and prior year development were $152.0 million and $38.5 million for the nine months ended September 30, 2025 and 2024, respectively. Catastrophe losses for the nine months ended September 30, 2025 were driven by the California wildfires ($159.7 million) and severe convective storms ($9.9 million), partially offset by favorable prior year development of $17.6 million. Catastrophe losses for the nine months ended September 30, 2024 were driven by Hurricane Helene ($33.9 million), the Calgary hailstorms ($12.3 million), and Hurricane Debby ($5.5 million), partially offset by favorable prior year development of $13.2 million.

For the Nine Months Ended
September 30,
($ in thousands)20252024
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - TSHF(1)$465,888$379,712
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other168,797118,806
$634,685$498,518
Net income (loss) attributable to non-controlling interest - TSHF$220,990$172,240

Total net realized and unrealized gains (losses) on investments and net investment income (loss) -TSHF, prior to non-controlling interest, returned income of $465.9 million and $379.7 million for the nine months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees.

Net investment income, net of non-controlling interest - TSHF, returned income of $244.9 million and $207.5 million for the nine months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees and performance incentive allocations. The aggregate incentive allocation to which the investment manager is entitled is included in "Net income (loss) attributable to non-controlling interest" in our GAAP financial statements.

TS Hamilton Fund produced returns, net of investment management fees and performance incentive allocations, of 13.0% and 12.2% for the nine months ended September 30, 2025 and 2024, respectively.

For the nine months ended September 30, 2025, TS Hamilton Fund experienced gains from single name equities trading within the equity market neutral vehicles STV, ESTV, and ATV. Gains from single name equities trading were led by the U.S., followed by East Asia. TS Hamilton Fund also experienced gains from macro trading within the scientific discretionary macro vehicle, NTV, the systematic macro vehicle, FTV, and the relative value macro vehicle, HTV. Gains in TS Hamilton Fund were partially offset by losses from macro trading within the relative value rates vehicle KTV. Losses from such macro trading were led by balance sheet trades in KTV.

For the nine months ended September 30, 2024, gains in TS Hamilton Fund were led by macroeconomic trading in FTV. Within FTV, gains were achieved in equities, commodities, fixed income, and credit, while losses were experienced in currencies. TS Hamilton Fund also saw gains from single name equities trading within STV and ESTV. In single name equities trading, gains were led by U.S. equities within STV, followed by non-U.S. equities within ESTV. Within ESTV, East Asia, Europe, Pan-America and China all made positive contributions to gains, in decreasing order.

Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other returned income of $168.8 million and $118.8 million for the nine months ended September 30, 2025 and 2024, respectively. Income for the nine months ended September 30, 2025 was primarily driven by investment income on a larger portfolio of higher yielding assets and positive mark-to-market returns. Income for the nine months ended September 30, 2024 was primarily driven by investment income on higher yielding assets and positive mark-to-market returns as a result of decreasing U.S. Treasury interest rates.

International Segment

For the Nine Months Ended
September 30,
($ in thousands)20252024
Gross premiums written$1,094,715$957,981
Net premiums written$791,473$687,444
Net premiums earned$746,078$637,700
Third party fee income10,30111,557
Claims and Expenses
Losses and loss adjustment expenses404,300359,181
Acquisition costs195,480160,589
Other underwriting expenses116,83399,317
Underwriting income (loss)$39,766$30,170
Attritional losses - current year$396,051$348,117
Attritional losses - prior year development(21,914)1,972
Catastrophe losses - current year30,64014,384
Catastrophe losses - prior year development(477)(5,292)
Losses and loss adjustment expenses$404,300$359,181
Attritional loss ratio - current year53.1%54.6%
Attritional loss ratio - prior year development(2.9)%0.3%
Catastrophe loss ratio - current year4.1%2.2%
Catastrophe loss ratio - prior year development(0.1)%(0.8)%
Losses and loss adjustment expense ratio54.2%56.3%
Acquisition cost ratio26.2%25.2%
Other underwriting expense ratio14.3%13.8%
Combined ratio94.7%95.3%
For the Nine Months Ended
September 30,
($ in thousands)20252024
Property$182,292$142,685
Casualty443,110397,400
Specialty469,313417,896
Total$1,094,715$957,981

Gross premiums written increased by $136.7 million, or 14.3%, from $958.0 million for the nine months ended September 30, 2024 to $1.1 billion for the nine months ended September 30, 2025. The increase was primarily driven by growth in both new and existing business in casualty, specialty and property insurance classes.

For the Nine Months Ended
September 30,
($ in thousands)20252024
Property$137,223$104,697
Casualty271,643234,760
Specialty337,212298,243
Total$746,078$637,700

Net premiums earned increased by $108.4 million, or 17.0%, from $637.7 million for the nine months ended September 30, 2024 to $746.1 million for the nine months ended September 30, 2025. The increase was primarily driven by growth in our casualty, property and specialty insurance classes. Casualty insurance growth was primarily driven by U.S. excess and surplus lines and mergers & acquisitions; property insurance growth was primarily driven by property binder business; and specialty insurance growth was primarily driven by accident & health and marine & energy.

For the Nine Months Ended
September 30,
($ in thousands)20252024
Third party fee income$10,301$11,557

Third party fee income decreased by $1.3 million, or 10.9%, from $11.6 million for the nine months ended September 30, 2024 to $10.3 million for the nine months ended September 30, 2025. The decrease was primarily due to a decrease in syndicate management fees. Effective July 1, 2025, the management of the third party syndicate was novated from Hamilton Managing Agency to another Lloyd's managing agency. This ended the Company's management of third party syndicates.

For the Nine Months Ended
($ in thousands)Current year% of net premiums earnedPrior year development% of net premiums earnedLosses and loss adjustment expenses% of net premiums earned
Attritional losses$396,05153.1%$(21,914)(2.9)%$374,13750.2%
Catastrophe losses30,6404.1%(477)(0.1)%30,1634.0%
Total$426,69157.2%$(22,391)(3.0)%$404,30054.2%
Attritional losses$348,11754.6%$1,9720.3%$350,08954.9%
Catastrophe losses14,3842.2%(5,292)(0.8)%9,0921.4%
Total$362,50156.8%$(3,320)(0.5)%$359,18156.3%

Attritional loss ratio - current year for the nine months ended September 30, 2025 was 53.1% compared to 54.6% for the nine months ended September 30, 2024, a decrease of 1.5 percentage points. The decrease was primarily driven by the reduced impact of large losses for the nine months ended September 30, 2025, compared to the same period in 2024, which was impacted by the Baltimore Bridge collapse.

Attritional loss ratio - prior year for the nine months ended September 30, 2025 wasa favorable 2.9% compared to an unfavorable 0.3% for the nine months ended September 30, 2024, a decrease of 3.2 percentage points. The favorable attritional loss ratio - prior year for the nine months ended September 30, 2025 was primarily driven by favorable development in property insurance, specialty reinsurance and insurance classes and casualty insurance classes, partially offset by modest unfavorable development in casualty reinsurance classes. In addition, casualty business protected by the LPT discussed in Note 6, Reinsurance, benefited from favorable development in the underlying reserves of $4.2 million, which was partially offset by a change in the deferred gain of $2.5 million, for a total net positive earnings impact of $1.7 million.

Catastrophe losses - current year and prior year were $30.2 million and $9.1 million for thenine months ended September 30, 2025 and 2024, respectively. Catastrophe losses for the nine months ended September 30, 2025 were driven by the California wildfires ($29.0 million) and severe convective storms ($1.6 million), partially offset by favorable prior year development of $0.4 million. Catastrophe losses for the nine months ended September 30, 2024 were driven by Hurricane Helene ($12.9 million) and Hurricane Debby ($1.5 million), partially offset byfavorable prior year development of $5.3 million.

For the Nine Months Ended
Acquisition Costs · % of Net Premiums Earned
($ in thousands)September 30,2025September 30,2024September 30,2025September 30,2024'25 vs '24point r
Property$45,834$35,65833.4%34.1%(0.7)
Casualty50,96537,61618.8%16.0%2.8
Specialty98,68187,31529.3%29.3%—
Total$195,480$160,58926.2%25.2%1.0

The acquisition cost ratio for the nine months ended September 30, 2025 was 26.2%, compared to 25.2% for the nine months ended September 30, 2024, an increase of 1.0 percentage point. The increase was primarily driven by casualty insurance classes and specialty reinsurance classes, primarily due to higher profit commission costs on certain lines of business and a change in business mix.

For the Nine Months Ended
September 30,
($ in thousands)20252024
Other underwriting expenses$116,833$99,317
Other underwriting expense ratio14.3%13.8%

Other underwriting expenses were $116.8 million for the nine months ended September 30, 2025, an increase of $17.5 million, or 17.6%, compared to $99.3 million for the nine months ended September 30, 2024. The increase was primarily driven by an increased headcount as we continued to build out underwriting teams supporting the corresponding increase in premium volume and increase in certain variable performance based compensation costs.

The other underwriting expense ratios for the nine months ended September 30, 2025 and 2024 increased from 13.8% to 14.3% driven by an increase in the underlying costs, partially offset by growth in the premium base.

Bermuda Segment

For the Nine Months Ended
September 30,
($ in thousands)20252024
Gross premiums written$1,159,462$920,664
Net premiums written$947,696$780,399
Net premiums earned$787,012$615,162
Third party fee income3,5446,377
Claims and Expenses
Losses and loss adjustment expenses539,575361,297
Acquisition costs169,628122,470
Other underwriting expenses47,83141,022
Underwriting income (loss)$33,522$96,750
Attritional losses - current year$424,058$326,786
Attritional losses - prior year development(6,356)5,119
Catastrophe losses - current year138,98037,315
Catastrophe losses - prior year development(17,107)(7,923)
Losses and loss adjustment expenses$539,575$361,297
Attritional loss ratio - current year53.9%53.1%
Attritional loss ratio - prior year development(0.8)%0.8%
Catastrophe loss ratio - current year17.7%6.1%
Catastrophe loss ratio - prior year development(2.2)%(1.3)%
Losses and loss adjustment expense ratio68.6%58.7%
Acquisition cost ratio21.6%19.9%
Other underwriting expense ratio5.6%5.6%
Combined ratio95.8%84.2%
For the Nine Months Ended
September 30,
($ in thousands)20252024
Property$437,425$394,053
Casualty571,915383,117
Specialty150,122143,494
Total$1,159,462$920,664

Gross premiums written increased by $238.8 million, or 25.9%, from $920.7 million for the nine months ended September 30, 2024 to $1.2 billion for the nine months ended September 30, 2025. The increase was primarily driven by growth in both new and existing business in casualty and property reinsurance classes, including certain non-recurring reinstatement premiums related to the California wildfires.

For the Nine Months Ended
September 30,
($ in thousands)20252024
Property$258,217$230,331
Casualty422,073293,535
Specialty106,72291,296
Total$787,012$615,162

Net premiums earned increased by $171.9 million, or 27.9%, from $615.2 million for the nine months ended September 30, 2024 to $787.0 million for the nine months ended September 30, 2025. The increase was primarily driven by new business and volume growth in our casualty, property and specialty reinsurance classes. The most significant drivers of this increase were general liability, professional liability and property treaty and quota share business.

For the Nine Months Ended
September 30,
($ in thousands)20252024
Third party fee income$3,544$6,377

Third party fee income is generated by certain performance based management fees recognized by Ada Capital Management Limited for services provided to Ada Re, Ltd. and decreased by $2.8 million, from $6.4 million for the nine months ended September 30, 2024 to $3.5 million for the nine months ended September 30, 2025.

For the Nine Months Ended
($ in thousands)Current year% of net premiums earnedPrior year development% of net premiums earnedLosses and loss adjustment expenses% of net premiums earned
Attritional losses$424,05853.9%$(6,356)(0.8)%$417,70253.1%
Catastrophe losses138,98017.7%(17,107)(2.2)%121,87315.5%
Total$563,03871.6%$(23,463)(3.0)%$539,57568.6%
Attritional losses$326,78653.1%$5,1190.8%$331,90553.9%
Catastrophe losses37,3156.1%(7,923)(1.3)%29,3924.8%
Total$364,10159.2%$(2,804)(0.5)%$361,29758.7%

Attritional loss ratio - current year for the nine months ended September 30, 2025 was 53.9% compared to 53.1% for the nine months ended September 30, 2024, an increase of 0.8 percentage points. The attritional loss ratio - current year for the nine months ended September 30, 2025 was impacted by two large losses in our specialty and property reinsurance classes, in addition to a change in business mix, including an increase in casualty reinsurance business. The attritional loss ratio - current year for the nine months ended September 30, 2024 included a specific large loss of $26.1 million arising from the Baltimore Bridge collapse.

Attritional loss ratio - prior year for the nine months ended September 30, 2025 was a favorable 0.8% compared to an unfavorable 0.8% for the nine months ended September 30, 2024, a decrease of 1.6 percentage points. The favorable attritional loss ratio - prior year for the nine months ended September 30, 2025 was primarily driven by favorable development in specialty and property reinsurance classes and casualty and property insurance classes, partially offset by unfavorable development in certain casualty reinsurance classes, including discontinued lines of business and additional information on certain large losses.

Catastrophe losses - current year and prior year were $121.9 million and $29.4 million for the nine months ended September 30, 2025 and 2024, respectively. Catastrophe losses for the nine months ended September 30, 2025 were driven by the California wildfires ($130.7 million) and severe convective storms ($8.3 million), partially offset by favorable prior year development of $17.1 million. Catastrophe losses for the nine months ended September 30, 2024 were driven by Hurricane Helene ($21.0 million), the Calgary hailstorms ($12.3 million), and Hurricane Debby ($4.0 million), partially offset by favorable prior year development of $7.9 million.

For the Nine Months Ended
Acquisition Costs · % of Net Premiums Earned
($ in thousands)September 30,2025September 30,2024September 30,2025September 30,2024'25 vs '24point r
Property$35,720$28,01913.8%12.2%1.6
Casualty110,53872,87526.2%24.8%1.4
Specialty23,37021,57621.9%23.6%(1.7)
Total$169,628$122,47021.6%19.9%1.7

The acquisition cost ratio for the nine months ended September 30, 2025 was 21.6%, compared to 19.9% for the nine months ended September 30, 2024. The increase was primarily driven by a change in business mix, including more proportional business written in our casualty reinsurance classes.

For the Nine Months Ended
September 30,
($ in thousands)20252024
Other underwriting expenses$47,831$41,022
Other underwriting expense ratio5.6%5.6%

Other underwriting expenses for the nine months ended September 30, 2025 were $47.8 million, an increase of $6.8 million, or 16.6%, compared to $41.0 million for the nine months ended September 30, 2024. The increase was primarily driven by an increased headcount as we continued to build out underwriting teams supporting the corresponding increase in premium volume and an increase in certain variable performance based compensation costs.

The other underwriting expense ratio for the nine months ended September 30, 2025 and 2024 remained flat at 5.6%.

Corporate and Other

For the Nine Months Ended
September 30,
($ in thousands)20252024
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - TSHF(1)$465,888$379,712
Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other168,797118,806
$634,685$498,518
Net income (loss) attributable to non-controlling interest - TSHF$220,990$172,240

Total net realized and unrealized gains (losses) on investments and net investment income (loss) -TSHF, prior to non-controlling interest, returned income of $465.9 million and $379.7 million for the nine months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees.

Net investment income, net of non-controlling interest - TSHF, returned income of $244.9 million and $207.5 million for the nine months ended September 30, 2025 and 2024, respectively. This includes the fund's returns, net of investment management fees and performance incentive allocations. The aggregate incentive allocation to which the investment manager is entitled is included in "Net income (loss) attributable to non-controlling interest" in our GAAP financial statements.

TS Hamilton Fund produced returns, net of investment management fees and performance incentive allocations, of 13.0% and 12.2% for the nine months ended September 30, 2025 and 2024, respectively.

For the nine months ended September 30, 2025, TS Hamilton Fund experienced gains from single name equities trading within the equity market neutral vehicles STV, ESTV, and ATV. Gains from single name equities trading were led by the U.S., followed by East Asia. TS Hamilton Fund also experienced gains from macro trading within the scientific discretionary macro vehicle, NTV, the systematic macro vehicle, FTV, and the relative value macro vehicle, HTV. Gains in TS Hamilton Fund were partially offset by losses from macro trading within the relative value rates vehicle KTV. Losses from such macro trading were led by balance sheet trades in KTV.

For the nine months ended September 30, 2024, gains in TS Hamilton Fund were led by macroeconomic trading in FTV. Within FTV, gains were achieved in equities, commodities, fixed income, and credit, while losses were experienced in currencies. TS Hamilton Fund also saw gains from single name equities trading within STV and ESTV. In single name equities trading, gains were led by U.S. equities within STV, followed by non-U.S. equities within ESTV. Within ESTV, East Asia, Europe, Pan-America and China all made positive contributions to gains, in decreasing order.

Total net realized and unrealized gains (losses) on investments and net investment income (loss) - other returned income of $168.8 million and $118.8 million for the nine months ended September 30, 2025 and 2024, respectively. Income for the nine months ended September 30, 2025 was primarily driven by investment income on a larger portfolio of higher yielding assets and positive mark-to-market returns. Income for the nine months ended September 30, 2024 was primarily driven by investment income on higher yielding assets and positive mark-to-market returns as a result of decreasing U.S. Treasury interest rates.

Net Foreign Exchange Gains (Losses)

For the Nine Months Ended
September 30,
($ in thousands)20252024
Net foreign exchange gains (losses)$(4,422)$(9,883)

Our functional currency is the U.S. Dollar. We may conduct routine underwriting operations or invest a portion of our cash and other investable assets in currencies other than U.S. Dollars. Consequently, we may incur foreign exchange gains and losses in our results of operations.

Foreign exchange losses of $4.4 million and $9.9 million for the nine months ended September 30, 2025 and 2024, respectively, were primarily driven by the remeasurement of insurance-related assets and liabilities denominated in British Pounds, Euro, Japanese Yen, and Australian and Canadian Dollars.

Corporate Expenses

For the Nine Months Ended
September 30,
($ in thousands)20252024
Corporate expenses$41,168$41,825

Corporate expenses for the nine months ended September 30, 2025 were $41.2 million, compared to $41.8 million for the nine months ended September 30, 2024, a decrease of $0.7 million. The decrease was the result of lower VAP expenses, partially offset by an increase in certain variable performance based compensation costs.

Amortization of Intangible Assets

For the Nine Months Ended
September 30,
($ in thousands)20252024
Amortization of intangible assets$11,895$11,773

Amortization of intangible assets of $11.9 million and $11.8 million for the nine months ended September 30, 2025 and 2024, respectively, relates to internally developed software and intangible assets acquired in a business combination.

Interest Expense

For the Nine Months Ended
September 30,
($ in thousands)20252024
Interest expense$15,264$17,090

Interest expense of $15.3 million and $17.1 million for the nine months ended September 30, 2025 and 2024, respectively, relates to interest payments and certain administrative fees associated with our term loan and letter of credit facilities. The decrease in interest expense was primarily driven by the decrease in the SOFR, which underlies the floating rate associated with the term loan.

Income Tax Expense (Benefit)

For the Nine Months Ended
September 30,
($ in thousands)20252024
Income tax expense (benefit)$9,748$6,118

Income tax expense for the nine months ended September 30, 2025 was $9.7 million, compared to $6.1 million for the nine months ended September 30, 2024, an increase of $3.6 million. Tax expense is primarily driven by withholding taxes on investment income from TS Hamilton Fund and income tax expense on earnings from our U.S. and Dublin operations, partially offset by a decrease in valuation allowance.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.